Hawaii's Mauna Loa and Kilauea are both shield volcanoes. Though they don't form a classic cone shape, shield volcanoes can be massive: Mauna Loa has an estimated volume of 18,000 cubic miles ...

A Martian volcano breaks through the clouds in a spectacular image captured by the Odyssey orbiter. This unprecedented view ...

These fiery peaks have belched up molten rock, hot ash, and gas since Earth formed billions of years ago. Get more information about volcanoes from National Geographic. 1 of 13 ...

Tiny glass beads brought back by NASA's Apollo 17 astronauts are helping scientists uncover new clues about how the moon ...

Scientists say the Kilauea volcano in Hawaii isn't done erupting. And it's not alone: 54 eruptions have been reported in 2025.

Arsia Mons, one of the Red Planet's largest volcanoes, peeks through a blanket of water ice clouds in this image captured by NASA's 2001 Mars Odyssey orbiter on May 2, 2025.

Learn about the largest active volcano on Earth Mauna Loa in Hawaii. Discover its massive size, eruption history, and ...

He said that the volcano formed a large crater, or caldera, that further collapsed and eroded over hundreds of millions of years, eventually leaving behind what we now know as the Blue Hills.

He said that the volcano formed a large crater, or caldera, that further collapsed and eroded over hundreds of millions of years, eventually leaving behind what we now know as the Blue Hills.

A NASA orbiter has captured a stunning image of a giant volcano on Mars. Arsia Mons -- along with two other volcanoes -- form ...